AP BIOLOGY

Detailed explanation-1: -The leaves in pteridophytes are small (microphylls) as in Selaginella or large (macrophylls) as in ferns. The sporophytes bear sporangia that are subtended by leaf-like appendages called sporophylls. In some cases sporophylls may form distinct compact structures called strobili or cones (Selaginella, Equisetum).

Detailed explanation-2: -The sporophytes bear sporangia that are subtended by leaf-like appendages called sporophylls.

Detailed explanation-3: -ferns. Each frond is a potential sporophyll (spore-bearing leaf) and as such can bear structures that are associated with reproduction.

Detailed explanation-4: -A sporophyll is a leaf that bears sporangia. Both microphylls and megaphylls can be sporophylls. In heterosporous plants, sporophylls (whether they are microphylls or megaphylls) bear either megasporangia and thus are called megasporophylls, or microsporangia and are called microsporophylls.

Detailed explanation-5: -These spores are formed in structures called sporangia. The leaves which bear these sporangia are called sporophylls. sori is a cluster of sporangia. The leaf or leaf-like part of a palm, fern, or similar plant is called frond. Hence the answer is sporophyll.